test: ofnode: test ofnode_by_prop_value()

Test ofnode_by_prop_value()
Signed-off-by: NJens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: NSimon Glass <sjg@chromium.org>

test/dm/ofnode.c

@@ -15,3 +15,30 @@ static int dm_test_ofnode_compatible(struct unit_test_state *uts)
 	return 0;
 }
 DM_TEST(dm_test_ofnode_compatible, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
+
+static int dm_test_ofnode_by_prop_value(struct unit_test_state *uts)
+{
+	const char propname[] = "compatible";
+	const char propval[] = "denx,u-boot-fdt-test";
+	const char *str;
+	ofnode node = ofnode_null();
+
+	/* Find first matching node, there should be at least one */
+	node = ofnode_by_prop_value(node, propname, propval, sizeof(propval));
+	ut_assert(ofnode_valid(node));
+	str = ofnode_read_string(node, propname);
+	ut_assert(str && !strcmp(str, propval));
+
+	/* Find the rest of the matching nodes */
+	while (true) {
+		node = ofnode_by_prop_value(node, propname, propval,
+					    sizeof(propval));
+		if (!ofnode_valid(node))
+			break;
+		str = ofnode_read_string(node, propname);
+		ut_assert(str && !strcmp(str, propval));
+	}
+
+	return 0;
+}
+DM_TEST(dm_test_ofnode_by_prop_value, DM_TESTF_SCAN_FDT);